If you're considering this for hormonal balance or skin health, the clinical evidence behind **Evening Primrose Oil** is surprisingly thin. Each softgel gives you 1,000mg of the oil with 750mg of omega-6 fatty acids — the key component being gamma-linolenic acid (GLA), though the exact GLA amount per serving isn't specified on the label.

At the suggested 2–3 softgels daily, you're getting 2,000–3,000mg of evening primrose oil total. Most studies that found any benefit used doses in this range, so your intake would at least match the research protocols. The omega-6 fatty acids in EPO are a different category from the omega-3s (EPA/DHA) found in fish oil — they don't serve the same function.

The biggest gap here is evidence quality. Systematic reviews for evening primrose oil in eczema, PMS, and menopause have generally found weak or inconsistent results. If you're considering this for a specific health goal, the research may not support what you're hoping for.

BioStacks
Natural Factors Omega Factors

Ultra Prim Evening Primrose Oil 1000 mg

Capsule · 90 servings · $0.19/serving

41 / 100Average

Score Breakdown

Formulation
41
Safety
100
Final score
41/100

Ingredients (1)

Ultra Prim Evening Primrose Oil1000 mg

Within effective range

Label Nutrition Facts

Nutrition

Calories and macros.

  • Calories10 Calorie(s)
  • Total Fat1 Gram(s)
    • Polyunsaturated Fat1 Gram(s)

Other Ingredients

Fillers, coatings, and additives

4Safe

GelatinCapsule

Safe

GlycerinHumectant

Safe

Mixed TocopherolsAntioxidant

Safe

Purified WaterSolvent

Safe

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Sources & Scoring

Nutrient data (RDA, UL, and safety thresholds) sourced from: NIH Office of Dietary Supplements and National Academies Dietary Reference Intakes (DRI).

This is not medical advice. Consult a healthcare provider before making changes to your supplement routine.

The score analyzes what's on the label: ingredient doses vs. clinical ranges, chemical forms, evidence levels, and known interactions. It does not verify label accuracy or test for contaminants — for that, look for third-party certifications like USP or NSF.